BECOME A FINGERPRINTING EXPERT

Forensic Science Project

Activity Objectives

During this activity you should be able to:

• Take your fingerprints and classify them according to the patterns of loop, arch, whorl and accidental
• Use this fingerprint classification system to match an unknown fingerprint to a series of known samples

Procedure

Part 1 - Making and Identifying Fingerprints

There are many methods of taking fingerprints, but using ink pad to make fingerprints is a common method. Please follow the procedure below.

• Make a fingerprint record chart similar to the one shown

• Roll your right index finger lightly on the ink pad, then roll the inked finger onto the space in your chart (you may have to practice this technique until you can produce a legible fingerprint).
• Repeat this method for each finger on your right hand
• Examine each print and identify its pattern. Record this information on the chart.

Part 2: Identifying an Unknown Fingerprint

• Obtain a copy of the fingerprints left by an unknown person on Mr Davis' lunch box. It is assumed that this is the person who ate Mr Davis' sandwich yesterday.
• Obtain a copy of the fingerprints of the possible suspects
• Classify the unknown fingerprint and the fingerprints on the possible suspects
• Based on your classification data, conclude, with supporting evidence, which of the possible suspects ate Mr Davis' sandwich.

Reflections on the Activity

Answer the following question in your crime lab book

1. Explain how you would use fingerprints collected from the scene of a crime to identify a suspect.

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